America's rivers are among the country's greatest natural assets, providing vital support to people and wildlife alike. But many are in danger.

American Rivers, an environmental group dedicated to the conservation of the nation's waterways, released its annual "America's Most Endangered Rivers" report on Tuesday.

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The report aims to highlight 10 threatened rivers with significance to human and natural communities "whose fate will be decided in the coming year." It advocates for those in power "to do the right thing" for the waterways.

Called "the lifeblood of the Southwest," the Lower Colorado providing drinking water for 1 in 10 Americans and supports five million acres of farmland growing crops. American Rivers says federal agencies and state water leaders "have made considerable progress" in conservation efforts, but it's being threatened by the White House's budget proposal, which cuts funding to environmental programs.

This Northern California river is popular for recreation, with diverse wildlife, and hold historic Native American sites. The 275-foot tall Centennial Dam, proposed by the Nevada Irrigation District, would add to the eight dams already on the river, and American Rivers says the NID hasn't demonstrated it is following best practices for water conservation. They call it a "costly and damaging project that may never be able to meet its states goals" and say it would flood recreation and Native American sites.

Poor water management is alleged to threaten "America's Amazon," a basin that "accounts for approximately 14 percent of all the freshwater flows in the continental U.S." The basin spans from Mississippi, Alabama and Georgia and is the second-largest intact river delta system in the country, containing more than 200 wetlands and waterways. American Rivers says mismanagement of water resources is becoming an issue rising in seriousness with more-frequent droughts.

Virginia's longest free-flowing river supports agriculture and other industries throughout the state, but American Rivers says natural gas fracking operations would endanger the waterway's health with drilling through the Potomac Aquifer. It urges local governments to became "the first line of defense" to protect the river.

Around 40 percent of North Carolina residents get their drinking water from these river basins, but American Rivers says hundred of millions of industrial agriculture waste piled near the rivers and streams could contaminate the waters. A simple solution would be to move concentrated animal feeding operations from the floodplain, though the state legislature would need to include the funding in a bill currently under consideration.

This waterway, which forms the southern boundary to Glacier National Park, is where the idea was born for the Wild and Scenic Rivers Act. According to American Rivers, toxic and flammable Bakken oil transported by rail could harm the swift-moving river and economy of the region if it spills. Eighteen trains of 100 tanks each pass the river weekly, and while no oil has spilled, there were 37 derailments along the corridor from 2000 to 2012. It is suggested that the Federal Railroad Administration develop a safety compliance with the Burlington Northern Santa Fe Railroad.

The country's first National River, designated in 1972, the Buffalo is major draw for nature lovers. Similar to the situation in North Carolina, a CAFO threatens the river's quality. A massive hog farm along a tributary generates waste "equivalent to a city of 30,000 people," American Rivers says. It urges the Arkansas Department of Environmental Quality to deny the CAFO a state permit that would allow it to operate in perpetuity.

Named after the Menominee tribe of Wisconsin, which has a deep connection to the river, the waterway faces a challenge from a proposed open pit sulfide mine. The threat of acid mine drainage would harm the wildlife and businesses that depend on the Menominee.